Public String Helloworld{
	public static void main(String[] args){
		System.out.println("3")
		System.out.println("2")
		System.out.println("1")
		System.out.println("Hello world")
		System.out.println("Hello world")
		System.out.println("1")
		System.out.println("2")
		System.out.println("3")
	}
}